Airbrake creation problems

formel117

Hello. I've been trying to create Airbreak in my mod for a while now, and I've come across a problem with it. When "going forward" it also goes upwards/downwards depending on if I'm in a vehicle and what vehicle it is, and if I'm on foot.

I've tried searching both here and on Google for examples on Airbrake but I can't seem to find any at all.